asn1_der_decoding_startEnd(3) libtasn1 asn1_der_decoding_startEnd(3)
NAME
asn1_der_decoding_startEnd - API function
SYNOPSIS
#include <libtasn1.h>
int asn1_der_decoding_startEnd(asn1_node element, const void * ider,
int ider_len, const char * name_element, int * start, int * end);
ARGUMENTS
asn1_node element
pointer to an ASN1 element
const void * ider
vector that contains the DER encoding.
int ider_len
number of bytes of * ider : ider [0].. ider [len-1]
const char * name_element
an element of NAME structure.
int * start the position of the first byte of NAME_ELEMENT decoding (
ider [*start])
int * end the position of the last byte of NAME_ELEMENT decoding (
ider [*end])
DESCRIPTION
Find the start and end point of an element in a DER encoding string. I
mean that if you have a der encoding and you have already used the
function asn1_der_decoding() to fill a structure, it may happen that
you want to find the piece of string concerning an element of the
structure.
One example is the sequence "tbsCertificate" inside an X509 certifi-
cate.
Note that since libtasn1 3.7 the ider and ider_len parameters can be
omitted, if the element is already decoded using asn1_der_decoding().
RETURNS
ASN1_SUCCESS if DER encoding OK, ASN1_ELEMENT_NOT_FOUND if ELEMENT is
asn1_node EMPTY or name_element is not a valid element, ASN1_TAG_ERROR
or ASN1_DER_ERROR if the der encoding doesn't match the structure ELE-
MENT.
COPYRIGHT
Copyright © 2006-2022 Free Software Foundation, Inc..
Copying and distribution of this file, with or without modification,
are permitted in any medium without royalty provided the copyright no-
tice and this notice are preserved.
SEE ALSO
The full documentation for libtasn1 is maintained as a Texinfo manual.
If the info and libtasn1 programs are properly installed at your site,
the command
info libtasn1
should give you access to the complete manual. As an alternative you
may obtain the manual from:
https://www.gnu.org/software/libtasn1/manual/
libtasn1 4.19.0 asn1_der_decoding_startEnd(3)
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